CN105922885B - Automotive electrical system pre-charge circuit and pre-charge method - Google Patents
Automotive electrical system pre-charge circuit and pre-charge method Download PDFInfo
- Publication number
- CN105922885B CN105922885B CN201610357499.0A CN201610357499A CN105922885B CN 105922885 B CN105922885 B CN 105922885B CN 201610357499 A CN201610357499 A CN 201610357499A CN 105922885 B CN105922885 B CN 105922885B
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- Prior art keywords
- lithium battery
- voltage
- control unit
- electronic control
- electrical installation
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Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 55
- 238000010616 electrical installation Methods 0.000 claims abstract description 35
- 230000005611 electricity Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000002411 adverse Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 206010037660 Pyrexia Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- H02J7/0086—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses automotive electrical system pre-charge circuit and methods, electronic control unit controller controls DC converter monitoring by CAN bus and inspires motor integrating, electrical installation loop voltage information, electronic control unit controller monitors lithium battery voltage information by CAN bus, and calculate voltage difference, it is larger in voltage difference, judgement needs to be pre-charged, electronic control unit control DC converter promoted accumulator output voltage to desired value to electrical installation circuit into line precharge, precharge is completed, electronic control unit control lithium battery closing relay makes lithium battery to electrical installation loop power supply.After preliminary filling, since lithium battery and electrical installation circuit both end voltage are close, larger dash current is no longer will produce, is avoided because of dash current, it is ensured that extends electric appliance service life while circuit reliability.
Description
Technical field
The present invention relates to 48V system automobile technical field of electric appliances, and in particular to a kind of automotive electrical system pre-charge circuit
And pre-charging schemes.
Background technology
As the development and Hyundai Motor of electronic apparatus technology are to oil consumption, efficiency, the requirements at the higher level of environmental protection, it is based on 12V
The base idle start and stop of electrical system（star-stop）System has been unable to meet increasingly harsh oil consumption mark to the contribution of oil consumption
Standard, 48V electrical systems high efficiency, oil consumption are excellent and to have the advantage of energy recovery function outstanding day by day.48V system voltage grades
Tradition 12V electrical systems relatively are higher, and power supply closure moment will generate higher dash current, to entire power grid and electric appliance
Service life adversely affect.
Invention content
The invention discloses automotive electrical system pre-charge circuits, and safe and reliable precharge side is provided for electrical system
Case effectively reduces dash current, eliminates the adverse effect brought by rush of current.
The present invention there is further disclosed herein automotive electrical system pre-charge method, effectively reduce dash current, eliminate because of electric current
Impact the adverse effect brought.
Automotive electrical system pre-charge circuit disclosed by the invention, including electronic control unit, DC converter, lithium battery, open
Send out motor integrating, electrical system and accumulator；Motor integrating and electrical system is inspired to be electrically connected to form electrical installation circuit, electric power storage
Pond is accessed electrical installation circuit by DC converter and is electrically connected respectively with motor integrating, electrical system is inspired, and lithium battery connects
Enter electrical installation circuit and is electrically connected respectively with motor integrating, electrical system is inspired；The electronic control unit is distinguished by CAN bus
It is connected with motor integrating, DC converter, lithium battery communication is inspired.
Further, the electrical system is the 48V electrical systems for powering for idling start stop system.
Automotive electrical system pre-charge method disclosed by the invention using foregoing circuit includes the following steps：
Step 1：Electronic control unit initializes default control parameters；
Step 2：Lithium battery sends lithium battery voltage information by CAN bus to ECU, and DC converter passes through CAN bus
Electrical installation loop voltage information is sent to electronic control unit；
Step 3：Electronic control unit compares lithium battery voltage and electrical installation loop voltage, generates voltage difference；
If voltage difference is less than or equal to setting value V, electronic control unit is controlled by CAN bus and is closed lithium battery interior relay
Make lithium battery to electrical installation loop power supply;
4 are entered step if voltage difference is greater than the set value V；
Step 4：DC converter calculates preliminary filling using lithium battery voltage as desired value, according to electrical installation circuit equivalent capacity
The electric time；
Step 5：DC converter converts electric energy in accumulator, promotes accumulator output voltage to desired value, starts to electricity
Gas performance loop charges；
Step 6：By precharge time, 2 are entered step.
Advantageous effects of the present invention are：In the 48V electrical systems for supporting idling start and stop energy regenerating, new-energy automobile
Provide it lithium battery can moment since 48V electrical system voltages demand compared with traditional mode 12V electrical systems is higher by one times,
When new-energy automobile switches to lithium battery power supply, electric appliance overcurrent damage, circuit fever and failure of insulation caused by dash current
The problems such as.Electronic control unit controller controls DC converter monitoring by CAN bus and inspires motor integrating, electrician in the present invention
Make loop voltage information, electronic control unit controller monitors lithium battery voltage information by CAN bus, and calculates voltage difference, in electricity
In the case of pressure difference is larger, judgement needs to be pre-charged, and electronic control unit controls DC converter and promotes accumulator output voltage to target
Value to electrical installation circuit into line precharge, complete by precharge, electronic control unit control lithium battery closing relay make lithium battery to
Electrical installation loop power supply.After preliminary filling, since lithium battery and electrical installation circuit both end voltage are close, no longer it will produce larger
Dash current, avoid because of dash current, it is ensured that electric appliance service life is extended while circuit reliability.
Description of the drawings
Fig. 1 is automotive electrical system pre-charge circuit schematic diagram of the present invention；
Fig. 2 is automotive electrical system pre-charge method flow chart of the present invention.
Specific implementation mode
In order to further explain the technical solution of the present invention, below by conjunction with attached drawing, the present invention will be described in detail.
As shown in Figure 1, automotive electrical system pre-charge circuit, including electronic control unit 1（Electronic Control
Unit）, DC converter 3, lithium battery 6, inspire motor integrating 2（Boost Recuperation System）, electrical system 5
And accumulator 6.
Motor integrating and electrical system is inspired to be electrically connected to form electrical installation circuit, accumulator is accessed by DC converter
Electrical installation circuit is simultaneously electrically connected with motor integrating, electrical system is inspired respectively, and lithium battery accesses electrical installation circuit and difference
It is electrically connected with motor integrating, electrical system is inspired.
Electronic control unit is connected with motor integrating, DC converter, lithium battery communication is inspired respectively by CAN bus.
Electrical system is the 48V electrical systems for powering for idling start stop system.
As shown in Fig. 2, automotive electrical system pre-charge method, includes the following steps：
Step 1：Electronic control unit 1 initializes default control parameters；
Step 2：Lithium battery 6 sends lithium battery voltage information by CAN bus to electronic control unit, and DC converter 3 passes through
CAN bus sends electrical installation loop voltage information to electronic control unit；
Step 3：Electronic control unit compares lithium battery voltage and electrical installation loop voltage, generates voltage difference；
If voltage difference is less than or equal to setting value（It may be configured as 2.5V）, controlled by CAN bus and be closed lithium battery interior
Relay makes inspiration motor integrating 2 and electrical system 5 of the lithium battery into electrical installation circuit power;
If voltage difference is greater than the set value（It may be set to 2.5v）Then enter step 4；
Step 4：DC converter calculates preliminary filling using lithium battery voltage as desired value, according to electrical installation circuit equivalent capacity
The electric time；
Step 5：DC converter converts electric energy in accumulator, promotes 4 output voltage of accumulator to desired value, starts to electricity
Gas performance loop charges；
Step 6：By precharge time, 2 are entered step.
Pre-charging schemes of the present invention are realized based on DC converter, lithium battery, electronic control unit, to inspire one electricity
Machine and 48V electrical systems make 48v electrical systems and inspire the electric loop voltage and lithium of motor integrating composition into line precharge
Cell voltage is consistent, when being closed to reduce lithium battery interior relay, the surge voltage that is generated in electric loop.
In full-vehicle control, after lithium battery wakes up, electronic control unit obtains electric loop respectively by DC converter, lithium battery
Voltage, lithium battery voltage, and calculate voltage difference；Voltage difference is excessive, and electronic control unit judgement needs to be pre-charged, electronic control unit control
DC converter conversion battery electric energy is pre-charged to close to lithium battery voltage levels electric loop.After preliminary filling, lithium battery
It is close with electric loop both end voltage, larger dash current is no longer will produce, the electric appliance overcurrent caused by dash current is avoided
The problems such as damage, circuit fever and failure of insulation, it is ensured that electric appliance service life is extended while circuit reliability.
Claims (3)
1. automotive electrical system pre-charge circuit, which is characterized in that including electronic control unit (1), DC converter (3), lithium battery
(6), motor integrating (2), electrical system (5) and accumulator (4) are inspired；Motor integrating and electrical system is inspired to be electrically connected to form electricity
Gas performance loop, accumulator by DC converter access electrical installation circuit and respectively with inspire motor integrating, electrical system
Electrical connection, lithium battery access electrical installation circuit are simultaneously electrically connected with motor integrating, electrical system is inspired respectively；The electronic control unit
It is connected respectively with motor integrating, DC converter, lithium battery communication is inspired by CAN bus；
The electronic control unit（1）For initializing default control parameters, and receive lithium battery（6）By CAN bus to automatically controlled list
The lithium battery voltage information and DC converter that member is sent（3）The electrical installation circuit sent to electronic control unit by CAN bus
Information of voltage, and lithium battery voltage and electrical installation loop voltage are compared, voltage difference is generated, if voltage difference is less than or equal to set
When definite value V, electronic control unit controls closure lithium battery interior relay by CAN bus makes lithium battery be supplied to electrical installation circuit
Electricity;DC converter is controlled if voltage difference is greater than the set value V using lithium battery voltage as desired value, according to electrical installation circuit
Equivalent capacity calculates precharge time, and control DC converter converts electric energy in accumulator, promotes accumulator（4）Output voltage is extremely
Desired value starts to charge to electrical installation circuit；
The lithium battery（6）For sending lithium battery voltage information to electronic control unit by CAN bus；
The DC converter（3）For sending electrical installation loop voltage information to electronic control unit by CAN bus, and in lithium
When cell voltage and electrical installation loop voltage difference are greater than the set value V, using lithium battery voltage as desired value, returned according to electrical installation
Road equivalent capacity calculates precharge time, converts electric energy in accumulator, promotes accumulator（4）Output voltage is to desired value, to electricity
Gas performance loop charges.
2. automotive electrical system pre-charge circuit as described in claim 1, it is characterised in that：The electrical system be for for
The 48V electrical systems of idling start stop system power supply.
3. using automotive electrical system pre-charge circuit as claimed in claim 1 or 2 into the method for line precharge, feature exists
In including the following steps：
Step 1：Electronic control unit（1）Initialize default control parameters；
Step 2：Lithium battery（6）By CAN bus lithium battery voltage information, DC converter are sent to electronic control unit（3）Pass through
CAN bus sends electrical installation loop voltage information to electronic control unit；
Step 3：Electronic control unit compares lithium battery voltage and electrical installation loop voltage, generates voltage difference；
If voltage difference is less than or equal to setting value V, electronic control unit controls closure lithium battery interior relay by CAN bus makes lithium
Battery is to electrical installation loop power supply;
4 are entered step if voltage difference is greater than the set value V；
Step 4：DC converter is using lithium battery voltage as desired value, when calculating precharge according to electrical installation circuit equivalent capacity
Between；
Step 5：DC converter converts electric energy in accumulator, promotes accumulator（4）Output voltage starts to desired value to electrical
Performance loop charges；
Step 6：By precharge time, 2 are entered step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610357499.0A CN105922885B (en) | 2016-05-26 | 2016-05-26 | Automotive electrical system pre-charge circuit and pre-charge method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610357499.0A CN105922885B (en) | 2016-05-26 | 2016-05-26 | Automotive electrical system pre-charge circuit and pre-charge method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105922885A CN105922885A (en) | 2016-09-07 |
| CN105922885B true CN105922885B (en) | 2018-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610357499.0A Active CN105922885B (en) | 2016-05-26 | 2016-05-26 | Automotive electrical system pre-charge circuit and pre-charge method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108011140B (en) * | 2016-11-01 | 2020-04-14 | 上海汽车集团股份有限公司 | Method and device for balancing electric quantity of storage battery of new energy automobile |
| CN106427648B (en) * | 2016-11-15 | 2018-11-16 | 许继电源有限公司 | A kind of charging pile precharge control method and device |
| CN106655644B (en) * | 2016-11-18 | 2023-04-14 | 广州市信征汽车零件有限公司 | Motor control system based on CAN bus |
| CN108322129B (en) * | 2018-03-19 | 2020-12-29 | 安徽江淮汽车集团股份有限公司 | Start-stop control method and system for BSG motor |
| EP4299363A4 (en) * | 2021-04-30 | 2024-04-17 | Huawei Digital Power Technologies Co., Ltd. | Charger, soft start method, electric vehicle, and charging system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7583063B2 (en) * | 2003-05-27 | 2009-09-01 | Pratt & Whitney Canada Corp. | Architecture for electric machine |
| CN102555825A (en) * | 2012-02-29 | 2012-07-11 | 郑州宇通客车股份有限公司 | High-voltage power distribution unit of hybrid electric bus |
| CN202602347U (en) * | 2012-03-27 | 2012-12-12 | 郑州宇通客车股份有限公司 | Pre-charging circuit with reverse charging function for new energy vehicles |
| CN104890668A (en) * | 2015-05-28 | 2015-09-09 | 安徽江淮汽车股份有限公司 | Control method for battery system of hybrid vehicle |
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| CN105922885A (en) | 2016-09-07 |
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